In 1999-2006 Paweł Machcewicz acted as the editor of one of the featured departments of the historical magazine "Mówią wieki". From 2000 to 2006 he served as president of the Biuro Edukacji Publicznej (Bureau of Public Education) at the Institute of National Remembrance (IPN). In 2007 he ran as candidate to the Kolegium office of the IPN from the recommendation of Members of Parliament of the Civic Platform.

On September 1, 2008, Machcewicz became one of principal advisers to the Prime Minister of Poland Donald Tusk, and an attorney in the Office of the President of Rada Ministrów (Council of Ministers) appointed to the Museum of the Second World War in Gdańsk. He was honoured with a Jerzy Giedroyc prize among others. Married, with two children.